Install & configure gulp

gulpfile.js

@@ -0,0 +1,35 @@
+const gulp   = require('gulp');
+const uglify = require('gulp-uglify');
+const pump   = require('pump');
+const zip    = require('gulp-zip');
+
+function js(done) {
+    pump([
+        gulp.src('assets/js/*.js', {sourcemaps: true}),
+        uglify(),
+        gulp.dest('assets/built/', {sourcemaps: '.'})
+    ], done());
+}
+
+exports.js = js;
+
+function zipper(done) {
+    var targetDir = 'dist/';
+    var themeName = require('./package.json').name;
+    var filename = themeName + '.zip';
+
+    pump([
+        gulp.src([
+            '**',
+            '!node_modules', '!node_modules/**',
+            '!dist', '!dist/**',
+            '!*.ignore',
+            '!gulpfile.js',
+            '!package-lock.json'
+        ]),
+        zip(filename),
+        gulp.dest(targetDir)
+    ], done());
+}
+
+exports.zip = zipper;

package.json

@@ -38,5 +38,17 @@
                 "width": 2000
             }
         }
+    },
+    "devDependencies": {
+        "gulp": "^4.0.2",
+        "gulp-uglify": "^3.0.2",
+        "pump": "^3.0.0"
+    },
+    "scripts": {
+        "js": "gulp js",
+        "zip": "gulp zip"
+    },
+    "dependencies": {
+        "gulp-zip": "^5.0.2"
     }
 }